Geologic formation in South Carolina
The Chandler Bridge Formation is a
geologic formation in
South Carolina . It preserves
fossils dating back to the
Chattian (Late
Oligocene ) of the
Paleogene
period , corresponding to the
Arikareean in the
NALMA classification .
[1] The formation overlies the
Ashley Formation and is overlain by the Edisto Formation.
[2]
Carnivorans reported from the Chandler Bridge Formation
Genus
Species
Presence
Material
Notes
Images
Phocidae
Gen. et. sp. indeterminate
Proximal portion of a right femur (ChM PV5712).
[3]
"A taxon closely comparable to the most specialized
phocid , the modern genus
Cystophora ".
Color key
Notes Uncertain or tentative taxa are in small text ; crossed out taxa are discredited.
Color key
Notes Uncertain or tentative taxa are in small text ; crossed out taxa are discredited.
Rays reported from the Chandler Bridge Formation
Genus
Species
Presence
Material
Notes
Images
Anoxypristis
A single rostral spine.
[11]
A
sawfish .
Dasyatidae
Dasyatidae gen. et. sp. indet.
Teeth (BCGM 9100 and 9101, SC 2009.18.19).
[11]
A
stingray .
Dasyatis
D. cavernosa
Teeth (BCGM 9096, 9097, and 9103, SC 2009.18.17).
[11]
A
stingray .
D. rugosa
BCGM 9098 and 9099, SC 2009.18.18.
[11]
A
stingray .
Gymnura
G. sp.
A tooth (BCGM 9107).
[11]
A
butterfly ray .
Mobula
M. cf. M. loupianensis
BCGM 9133–9142, SC 2009.18.20.
[11]
Myliobatinae
Myliobatinae gen. indet.
Partial medial teeth and complete lateral teeth (BCGM 9114–9117, SC 2009.18.22).
[11]
An
eagle ray .
Paramobula
P. fragilis
Teeth (BCGM 9111–9113, SC 2009.18.21).
[11]
Plinthicus
P. stenodon
Upper sandy unit.
[4]
BCGM 9118–9121, SC 2009.18.23
[11]
The oldest record of this species.
Raja
Raja mccollumi
"
Summerville ,
Dorchester County, South Carolina ".
[11]
Teeth.
[11]
A
skate also found in the
Ashley Formation .
R. sp.
Teeth (BCGM 9087–9089, SC 2009.18.16).
[11]
A
skate with teeth twice as large as those of R. mccollumi , but far less common.
[11]
Rhinoptera
R. cf. R. studeri
Teeth (BCGM 9122 and 9123, SC 2009.18.24).
[11]
A
cownose ray .
R. sp.
Upper sandy unit.
[4]
A
cownose ray .
Rhynchobatus
R. pristinus
Teeth (BCGM 9084–9086, SC 2009.18.14).
[11]
A
wedgefish .
Sharks reported from the Chandler Bridge Formation
Genus
Species
Presence
Material
Notes
Images
Alopias
A. cf.
A. vulpinus
Teeth (BCGM 9046–9048, SC 2009.18.3).
[11]
A
thresher shark .
Bythaelurus
B. sp.
A fragmentary tooth (BCGM 9074).
[11]
A
catshark .
Carcharias
C. cuspidatus
Teeth (BCGM 9051 and 9052).
[11]
A
sand shark .
C. sp.
A posterior tooth (BCGM 9053) and a lateral tooth from a very young individual (BCGM 9054).
[11]
A
sand shark .
Carcharhinus
C. gibbesi
BCGM 9056–9062, SC 2009.18.6.
[11]
The most abundant non-
batoid
elasmobranch in the Chandler Bridge sample.
[11]
C. leucas
Upper sandy unit.
[4]
The
bull shark .
Carcharocles
C. angustidens
Upper sandy unit.
[4]
Teeth.
[23]
Reassigned to the genus
Otodus .
C. sp.
Teeth (BCGM 9055, SC 2009.18.5).
[11]
Reassigned to the genus
Otodus .
Cetorhinus
?C. parvus
Scales (BCGM 9049 and 9050, SC 2009.18.4).
[11]
A
basking shark .
Galeocerdo
G. 'casei'
Upper sandy unit.
[4]
Galeorhinus
G. sp.
Teeth (BCGM 9080–9083, SC 2009.18.13).
[11]
A
houndshark .
Hemipristis
H. serra
Teeth (BCGM 9071–9073, SC 2009.18.10).
[11]
A
weasel shark .
Nebrius
N. cf. N. serra
A tooth (SC 2009.18.1).
[11]
A
nurse shark .
Otodus
O. angustidens
Upper sandy unit.
[4]
Teeth.
[23]
Assemblages dominated by teeth of juveniles and neonates, with few adults present, suggesting a nursery area for the species.
[23]
O. sp.
Teeth (BCGM 9055, SC 2009.18.5).
[11]
A
megatooth shark .
Physogaleus
P. aduncus
Teeth (BCGM 9063–9066, SC 2009.18.7).
[11]
A
ground shark .
P. contortus
Upper sandy unit.
[4]
A
ground shark .
P. sp.
Broken and/or abraded teeth (BCGM 9067 and 9068, SC 2009.18.8).
[11]
A
ground shark .
Rhincodon
R. cf.
R. typus
Teeth (BCGM 9044 and 9045, SC 2009.18.2).
[11]
The oldest fossil record of the
whale shark .
Rhizoprionodon
R. sp.
Small, imperfectly preserved teeth (BCGM 9069 and 9070, SC 2009.18.9).
[11]
A
sharpnose shark .
Sphyrna
S. cf.
S. media
BCGM 9075–9077, SC 2009.18.11.
[11]
A
hammerhead shark .
S. zygaena
BCGM 9078 and 9079, SC 2009.18.12.
[11]
The more common of the two
hammerhead shark species found in the formation.
[11]
Squatina
S. cf. S. angeloides
BCGM 9042 and 9043.
[11]
An
angelshark .
^
Chandler Bridge Formation at
Fossilworks .org
^ Albright et al., 2019, p.84
^ J., Ray, Clayton Edward. Emry, Robert (2002).
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